Barr body noun phr. [bɑ: 'bɒdi] M20.
[from M. L. Barr (1908-95), Canad. anatomist.]
Genetics. A strongly heterochromatic body just inside the membrane of non-dividing cell nuclei in females, representing a condensed, inactive X chromosome and diagnostic of genetic femaleness.

[TahlilGaran] English Dictionary ▲